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Leptosuchus ✝

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Description

Leptosuchus is an extinct genus of leptosuchomorph phytosaurid with a complex taxonomical history. Fossils have been found from the Dockum Group and lower Chinle Formation outcropping in Texas, New Mexico, and Arizona, USA, and date back to the Carnian stage of the Late Triassic.

From Wikipedia article at https://en.wikipedia.org/wiki/Leptosuchus, which is released under the Creative Commons Attribution-Share-Alike License 3.0.

Source Data

Source	ID	Link
Global Biodiversity Information Facility ID (GBIF)	4818625	https://www.gbif.org/species/4818625
PaleoBioDB ID (PBDB)	64948	https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=64948

Rank

genus

Taxonomy (GBIF)

Life : Animalia : Chordata : Reptilia : Thecodontia : Parasuchidae : Leptosuchus

Taxonomy (PBDB)

Life : Animalia : Chordata : Reptilia : Eosuchia : Parasuchidae : Leptosuchus

Taxonomic Status (GBIF)

accepted

Classification
(PBDB,GBIF)

Rank	Name	Author
-	Eukaryota
-	Opisthokonta	Cavalier-Smith 1987
kingdom	Animalia
-	Triploblastica	Lankester 1877
-	Nephrozoa	Jondelius et al. 2002
-	Deuterostomia	Grobben 1908
phylum	Chordata	Haeckel 1847
subphylum	Vertebrata	Lamarck 1801
superclass	Gnathostomata	Gegenbauer 1874
-	Osteichthyes
-	Sarcopterygii	Romer 1955
subclass	Dipnotetrapodomorpha
subclass	Tetrapodomorpha
-	Tetrapoda
-	Reptiliomorpha	Säve-Söderbergh 1934
-	Anthracosauria	Säve-Söderbergh 1934
-	Batrachosauria
-	Cotylosauria
-	Amniota	Haeckel 1866
-	Sauropsida	Huxley 1864
class	Reptilia	Laurenti 1768
subclass	Eureptilia
-	Romeriida	Gauthier et al. 1988
-	Diapsida
-	Eosuchia
-	Neodiapsida	Benton 1985
-	Sauria	Gauthier 1984
-	Archosauromorpha
-	Crocopoda	Ezcurra 2016
-	Archosauriformes	Gauthier 1986
-	Eucrocopoda	Ezcurra 2016
-	Archosauria
-	Pseudosuchia
-	Phytosauria
family	Parasuchidae	Lydekker 1885
subfamily	Mystriosuchinae	von Huene 1915
-	Leptosuchomorpha	Stocker 2010
genus	Leptosuchus	Case 1922

Scientific Name

Leptosuchus Case, 1922

Name Published In

Publ. Carnegie Inst., No. 321

Opinions (PBDB)

Name	Rank	Opinion	Evidence	Author
Leptosuchus	genus	subjective synonym of Rutiodon	stated with evidence	Gregory, 1962
Leptosuchus	genus	subjective synonym of Rutiodon	stated without evidence	Hunt and Lucas, 1989
Leptosuchus	genus	belongs to Rutiodontinae	stated with evidence	Long and Murry, 1995
Leptosuchus	genus	belongs to Parasuchia	implied	Irmis, 2005
Leptosuchus	genus	belongs to Leptosuchomorpha	stated with evidence	Stocker, 2010

Status (PBDB)

extinct

Taxon Size (PBDB)

First Recorded Appearance

237 - 209 Ma
Late/Upper Triassic

Last Recorded Appearance

228 - 209 Ma
Late/Upper Triassic

Environment

terrestrial (based on Diapsida)

Motility

actively mobile (based on Osteichthyes)

Diet

carnivore (based on Phytosauria)

Taphonomy

phosphatic (based on Vertebrata)

Primary Reference (PBDB)

E. C. Case. 1922. New reptiles and stegocephalians from the Upper Triassic of western Texas. Carnegie Institute of Washington Publication 221:1-84

Wikipedia

https://en.wikipedia.org/wiki/Leptosuchus

Fossil Distribution

Subtaxa

Name	Status	Common Name(s)	Fossil Occurrences	Oldest	Youngest
Leptosuchus crosbiensis ✝ species	accepted (GBIF) listed (PBDB)		9	237 Ma Middle Triassic	228 Ma Late/Upper Triassic
Leptosuchus studeri ✝ species	accepted (GBIF) listed (PBDB)		1	237 Ma Middle Triassic	237 Ma Middle Triassic

Synonymy List

Year	Name and Author
1922	Leptosuchus Case p. 61
1995	Leptosuchus Long and Murry
2005	Leptosuchus Irmis p. 72
2010	Leptosuchus Stocker p. supplement
2013	Leptosuchus Stocker and Butler
2016	Leptosuchus Kammerer et al.

References

Case E. C. (1922) New reptiles and stegocephalians from the Upper Triassic of western Texas, Carnegie Institute of Washington Publication 221, 1-84

Long R. A., Murry P. A. (1995) Late Triassic (Carnian and Norian) tetrapods from the southwestern United States, New Mexico Museum of Natural History and Science Bulletin 4, 1-254

Irmis R. B. (2005) The vertebrate fauna of the Upper Triassic Chinle Formation in northern Arizona, In S. J. Nesbitt, W. G. Parker, & R. B. Irmis (eds.), Guidebook to the Triassic Formations of the Colorado Plateau in Northern Arizona: Geology, Paleontology, and History. Mesa Southwest Museum Bulletin 9, 63-88

Stocker M. R. (2010) A new taxon of phytosaur (Archosauria: Pseudosuchia) from the Late Triassic (Norian) Sonsela Member (Chinle Formation) in Arizona, and a critical reevaluation of Leptosuchus Case, 1922, Palaeontology 53, 997-1022

Stocker M. R., Butler R. J. (2013) Phytosauria, Anatomy, Phylogeny and Palaeobiology of Early Archosaurs and their Kin. Geological Society, London, Special Publications 379

Kammerer C. F., Butler R. J., et al (2016) Relationships of the Indian phytosaur Parasuchus hislopi Lydekker, 1885, Papers in Palaeontology 2, 1-23

Nomenclator Zoologicus. A list of the names of genera and subgenera in zoology from the tenth edition of Linnaeus, 1758 to the end of 2004. Digitised by uBio from vols. 1-9 of Neave (ed.), 1939-1996 plus supplementary digital-only volume. http://ubio.org/NomenclatorZoologicus (as at 2006). - via The Interim Register of Marine and Nonmarine Genera

Publ. Carnegie Inst., No. 321 - via The Interim Register of Marine and Nonmarine Genera

Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!

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